| 低频波长调制光谱的理论与实验研究 |
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| 引用本文： | 李倩,肖连团,李昌勇,贾锁堂,周国生.低频波长调制光谱的理论与实验研究[J].光学学报,2001,21(3):17-319. |
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| 作者姓名： | 李倩 肖连团 李昌勇 贾锁堂 周国生 |
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| 作者单位： | 山西大学电子系，太原 030006 |
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| 基金项目： | 国家自然科学基金，山西省自然科学基金 |
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| 摘 要： | 通过调制半导体激光外腔压电陶瓷的电压实现低频波长调制 ,并慢扫描激光器的波长 ,测量了CS 原子D2线 6S1 2 (F =4)→ 6P3 2 ]的吸收光谱 ,利用锁相放大器处理了二次、四次、六次谐波信号 ,实验结果与理论分析相吻合 ,在实验过程中还发现高次谐波探测可以有效地提高探测信号的信噪比
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| 关 键 词： | 谐波探测 外腔式二极管激光器 波长调制光谱 信噪比 |
Theoretical and Experimental Investigation of Low-Frequency Wavelength Modulation Spectroscpy |
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| Li Qian,Xiao Liantuan,Li Changyong,Jia Suotang,Zhou Guosheng.Theoretical and Experimental Investigation of Low-Frequency Wavelength Modulation Spectroscpy[J].Acta Optica Sinica,2001,21(3):17-319. |
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| Authors: | Li Qian Xiao Liantuan Li Changyong Jia Suotang Zhou Guosheng |
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| Abstract: | A series of experiments are carried out by modulating piezovoltage of an external-cavity continuously tunalbe diode laser. Cesium atom D2 line (6S1/2→6P3/2) absorption spectrum is measured by harmonic detection with a lock-in amplifier. The results about various harmonic signals in experiment are agreement with that in theory. The high-order harmonic detection may result in a significant improvement in signal-to-noise-ratio (SNR). |
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| Keywords: | harmonic detection external cavity diode laser wavelength modulation spectroscopy signal to noise ratio |
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